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Add initial packager plugin
This is very much a work in progress. It's just a proof of concept at this point and just works for very simple examples. The plugin invocation is as follows: ``` swift package --swift-sdk wasm32-unknown-wasi js ```
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‎.gitignore

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xcuserdata/
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.swiftpm
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.vscode
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Examples/*/Bundle
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Examples/*/package-lock.json

‎Examples/Basic/Package.swift

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]
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)
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],
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swiftLanguageVersions: [.v5]
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swiftLanguageModes: [.v5]
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)

‎Examples/Basic/build.sh

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#!/bin/bash
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swift build --swift-sdk "${SWIFT_SDK_ID:-wasm32-unknown-wasi}" -Xswiftc -Xclang-linker -Xswiftc -mexec-model=reactor -Xlinker --export=__main_argc_argv
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set -ex
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swift package --swift-sdk "${SWIFT_SDK_ID:-wasm32-unknown-wasi}" -c "${1:-debug}" js --use-cdn

‎Examples/Basic/index.html

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</head>
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<body>
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<script src="./index.js" type="module"></script>
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<script type="module">
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import { init } from "./.build/plugins/PackageToJS/outputs/Package/index.js";
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await init(fetch("./.build/plugins/PackageToJS/outputs/Package/main.wasm"));
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</script>
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</body>
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</html>

‎Examples/Basic/index.js

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‎Examples/Embedded/_Runtime

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‎Examples/Embedded/build.sh

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#!/bin/bash
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package_dir="$(cd "$(dirname "$0")" && pwd)"
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JAVASCRIPTKIT_EXPERIMENTAL_EMBEDDED_WASM=true \
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swift build --package-path "$package_dir" --product EmbeddedApp \
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-c release --triple wasm32-unknown-none-wasm
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swift package --package-path "$package_dir" \
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-c release --triple wasm32-unknown-none-wasm js

‎Examples/Embedded/index.html

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</head>
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<body>
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<script src="./index.js" type="module"></script>
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<script type="module">
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import { init } from "./.build/plugins/PackageToJS/outputs/Package/index.js";
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await init(fetch("./.build/plugins/PackageToJS/outputs/Package/main.wasm"));
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</script>
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</body>
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</html>

‎Examples/Embedded/index.js

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‎Examples/Multithreading/Sources/JavaScript/index.js

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‎Examples/Multithreading/Sources/JavaScript/instantiate.js

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‎Examples/Multithreading/Sources/JavaScript/worker.js

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‎Examples/Multithreading/build.sh

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swift build --swift-sdk "${SWIFT_SDK_ID:-wasm32-unknown-wasip1-threads}" -Xswiftc -Xclang-linker -Xswiftc -mexec-model=reactor -Xlinker --export=__main_argc_argv -c release -Xswiftc -g
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swift package --swift-sdk "${SWIFT_SDK_ID:-wasm32-unknown-wasip1-threads}" -c release \
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plugin --allow-writing-to-package-directory \
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js --use-cdn --output ./Bundle

‎Examples/Multithreading/index.html

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</head>
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<body>
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<script type="module" src="Sources/JavaScript/index.js"></script>
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<script type="module">
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import { init } from "./Bundle/index.js"
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init(fetch(new URL("./Bundle/main.wasm", import.meta.url)));
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</script>
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<h1>Threading Example</h1>
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<p>
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<div>
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<label for="background">Background:</label>
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<input id="background" type="checkbox" checked>
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</div>
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<div>
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<label for="size">Size:</label>
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<input id="size" type="number" value="800">
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</div>
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<div>
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<label for="concurrency">Concurrency:</label>
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<input id="concurrency" type="number">
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<button id="render-button">Render</button>
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</div>
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<div>
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<label for="background">Background:</label>
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<input id="background" type="checkbox" checked>
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</div>
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<div>
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<label for="size">Size:</label>
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<input id="size" type="number" value="800">
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</div>
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<div>
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<label for="concurrency">Concurrency:</label>
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<input id="concurrency" type="number">
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<button id="render-button">Render</button>
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</div>
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</p>
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<p>
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<div id="loading-emoji" class="loading-emoji">🧵</div>
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<div id="loading-emoji" class="loading-emoji">🧵</div>
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</p>
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<p id="render-time"></p>
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<canvas id="canvas"></canvas>

‎Examples/OffscrenCanvas/README.md

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jq -r '.["swift-sdks"]["wasm32-unknown-wasip1-threads"]["id"]'
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)
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$ ./build.sh
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$ npx serve
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$ npx vite
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```

‎Examples/OffscrenCanvas/build.sh

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swift build --swift-sdk "${SWIFT_SDK_ID:-wasm32-unknown-wasip1-threads}" -Xswiftc -Xclang-linker -Xswiftc -mexec-model=reactor -Xlinker --export=__main_argc_argv -c release -Xswiftc -g
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swift package --swift-sdk "${SWIFT_SDK_ID:-wasm32-unknown-wasip1-threads}" -c release \
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plugin --allow-writing-to-package-directory \
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js --use-cdn --output ./Bundle

‎Examples/OffscrenCanvas/index.html

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</head>
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<body>
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<script type="module" src="Sources/JavaScript/index.js"></script>
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<script type="module">
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import { init } from "./Bundle/index.js"
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init(fetch(new URL("./Bundle/main.wasm", import.meta.url)));
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</script>
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<h1>OffscreenCanvas Example</h1>
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<p>
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<div>

‎Examples/OffscrenCanvas/serve.json

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‎Examples/OffscrenCanvas/serve.json

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{
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"headers": [{
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"source": "**/*",
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"headers": [
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{
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"key": "Cross-Origin-Embedder-Policy",
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"value": "require-corp"
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}, {
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"key": "Cross-Origin-Opener-Policy",
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"value": "same-origin"
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}
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]
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}]
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}

‎Examples/Testing/.gitignore

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.DS_Store
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/.build
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/Packages
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xcuserdata/
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DerivedData/
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.swiftpm/configuration/registries.json
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.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
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.netrc

‎Examples/Testing/Package.swift

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// swift-tools-version: 6.0
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// The swift-tools-version declares the minimum version of Swift required to build this package.
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import PackageDescription
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let package = Package(
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name: "Counter",
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products: [
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// Products define the executables and libraries a package produces, making them visible to other packages.
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.library(
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name: "Counter",
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targets: ["Counter"]),
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],
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dependencies: [.package(name: "JavaScriptKit", path: "../../")],
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targets: [
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// Targets are the basic building blocks of a package, defining a module or a test suite.
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// Targets can depend on other targets in this package and products from dependencies.
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.target(
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name: "Counter",
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dependencies: [
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.product(name: "JavaScriptKit", package: "JavaScriptKit")
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]),
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.testTarget(
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name: "CounterTests",
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dependencies: ["Counter"]
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),
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]
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)

‎Examples/Testing/Sources/Counter/Counter.swift

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public struct Counter {
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public private(set) var count = 0
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public mutating func increment() {
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count += 1
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}
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}

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